Sequential Aggregate Signatures and Multisignatures without Random Oracles

Steve Lu; Rafail Ostrovsky; Amit Sahai; Hovav Shacham; Brent Waters

Paper 2006/096

Sequential Aggregate Signatures and Multisignatures without Random Oracles

Steve Lu, Rafail Ostrovsky, Amit Sahai, Hovav Shacham, and Brent Waters

Abstract

We present the first aggregate signature, the first multisignature, and the first verifiably encrypted signature provably secure without random oracles. Our constructions derive from a novel application of a recent signature scheme due to Waters. Signatures in our aggregate signature scheme are sequentially constructed, but knowledge of the order in which messages were signed is not necessary for verification. The aggregate signatures obtained are shorter than Lysyanskaya et~al. sequential aggregates and can be verified more efficiently than Boneh et~al. aggregates. We also consider applications to secure routing and proxy signatures.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. To appear in Eurocrypt 2006.
Keywords: Aggregate Signatures
Contact author(s): bwaters @ csl sri com
History: 2006-03-12: received
Short URL: https://ia.cr/2006/096
License: CC BY

BibTeX

@misc{cryptoeprint:2006/096,
      author = {Steve Lu and Rafail Ostrovsky and Amit Sahai and Hovav Shacham and Brent Waters},
      title = {Sequential Aggregate Signatures and Multisignatures without Random Oracles},
      howpublished = {Cryptology {ePrint} Archive, Paper 2006/096},
      year = {2006},
      url = {https://eprint.iacr.org/2006/096}
}